JPS6344995B2 - - Google Patents

Info

Publication number
JPS6344995B2
JPS6344995B2 JP59058162A JP5816284A JPS6344995B2 JP S6344995 B2 JPS6344995 B2 JP S6344995B2 JP 59058162 A JP59058162 A JP 59058162A JP 5816284 A JP5816284 A JP 5816284A JP S6344995 B2 JPS6344995 B2 JP S6344995B2
Authority
JP
Japan
Prior art keywords
valve body
gas
switching
housing
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
JP59058162A
Other languages
Japanese (ja)
Other versions
JPS60205075A (en
Inventor
Toshiro Tomyama
Masaaki Yamanashi
Hitoshi Morishita
Fumio Sudo
Shuzo Fujii
Hideo Miwa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
Kawasaki Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP59058162A priority Critical patent/JPS60205075A/en
Priority to US06/605,137 priority patent/US4552334A/en
Priority to ZA843193A priority patent/ZA843193B/en
Priority to AU27554/84A priority patent/AU545661B1/en
Priority to CA000453441A priority patent/CA1212595A/en
Priority to FR8406876A priority patent/FR2566087B1/en
Priority to KR8402395A priority patent/KR890005125B1/en
Priority to IT20798/84A priority patent/IT1174078B/en
Publication of JPS60205075A publication Critical patent/JPS60205075A/en
Publication of JPS6344995B2 publication Critical patent/JPS6344995B2/ja
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/48—Bottoms or tuyéres of converters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/08—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks
    • F16K11/087—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with spherical plug
    • F16K11/0873—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with spherical plug the plug being only rotatable around one spindle
    • F16K11/0876—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with spherical plug the plug being only rotatable around one spindle one connecting conduit having the same axis as the spindle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/16—Actuating devices; Operating means; Releasing devices actuated by fluid with a mechanism, other than pulling-or pushing-rod, between fluid motor and closure member
    • F16K31/163—Actuating devices; Operating means; Releasing devices actuated by fluid with a mechanism, other than pulling-or pushing-rod, between fluid motor and closure member the fluid acting on a piston
    • F16K31/1635—Actuating devices; Operating means; Releasing devices actuated by fluid with a mechanism, other than pulling-or pushing-rod, between fluid motor and closure member the fluid acting on a piston for rotating valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/4238—With cleaner, lubrication added to fluid or liquid sealing at valve interface
    • Y10T137/4245—Cleaning or steam sterilizing
    • Y10T137/4259—With separate material addition
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86501—Sequential distributor or collector type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86815—Multiple inlet with single outlet
    • Y10T137/86823—Rotary valve
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86863—Rotary valve unit
    • Y10T137/86871—Plug

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Taps Or Cocks (AREA)
  • Multiple-Way Valves (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Description

【発明の詳細な説明】 この発明は、溶融金属保持器への流体吹込み用
切換弁に関し、特に底吹き転炉炉内に主として精
錬段階の推移に応じて選択使用する複数種の流体
（互いに混合するのが好ましくない粉末を含むガ
ス流体）を択一的に吹込むときにガス種選択用の
選択弁として有利に用いられる切換弁について提
案する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a switching valve for injecting fluid into a molten metal holder, and in particular, a switching valve for injecting fluid into a molten metal holder, and in particular, a switching valve for injecting fluid into a molten metal holder, and in particular, a switching valve for injecting fluid into a molten metal holder. The present invention proposes a switching valve that can be advantageously used as a selection valve for selecting gas types when alternatively blowing a gaseous fluid containing powder that is undesirable to mix.

底吹式の転炉において多量のスクラツプを使用
して製鋼製錬する方法として、一部の炉底羽口か
ら、例えば石炭粉とメタンガスの混合物を吹込
み、それと同時に、残りの羽口から酸素ガスを吹
込んでスクラツプを溶解した後、流体通路に配設
されている切換弁の流路を切換えることにより、
それまで石炭粉を含むメタンガスが吹込まれてい
た羽口から、引続いて生石灰粉等を含む酸素ガス
を吹込み精錬する技術が、西ドイツ国特許公告第
2838983号や特開昭57−29521号等で提案されてい
る。 A method of smelting steel using a large amount of scrap in a bottom-blowing converter is to blow a mixture of coal powder and methane gas into some of the bottom tuyeres, and at the same time blow oxygen into the remaining tuyeres. After dissolving the scrap by blowing in gas, by switching the flow path of the switching valve installed in the fluid path,
A technology for refining by subsequently injecting oxygen gas containing quicklime powder, etc. through the tuyeres, which had previously been injected with methane gas containing coal powder, was published in the West German Patent Publication.
It has been proposed in No. 2838983 and Japanese Patent Application Laid-Open No. 57-29521.

この精錬法には、精錬段階の推移に応じて、炉
内に吹込む流体を変えなければならず、そのため
に切換弁が必要である。こうした要請に応えられ
るものとして、特開昭56−33415号として、次の
ような構造の切換弁が提案されている。すなわ
ち、「キヤリヤーガス内に浮遊する炭素を含有し
た微細粒燃料および酸素を鉄溶融浴内に導入する
装置において、 燃料供給パイプと酸素供給パイプと羽口パイプ
とを有するハウジング内に可動弁部材を配置して
おり、該弁部材が燃料孔断面または酸素孔断面を
開きそして供給パイプ内の酸素の圧力により動作
されることを特徴とする炭素を含有する微細粒燃
料を鉄溶融浴内に導入する装置。」がそれである。 This refining method requires changing the fluid injected into the furnace depending on the progress of the refining stages, and therefore requires a switching valve. In order to meet these demands, a switching valve having the following structure has been proposed in Japanese Patent Application Laid-Open No. 56-33415. That is, in a device for introducing fine particle fuel containing carbon suspended in a carrier gas and oxygen into a molten iron bath, a movable valve member is disposed within a housing having a fuel supply pipe, an oxygen supply pipe, and a tuyere pipe. A device for introducing carbon-containing fine particle fuel into a molten iron bath, characterized in that the valve member opens a fuel hole cross section or an oxygen hole cross section and is operated by the pressure of oxygen in a supply pipe. .” is that.

第１図は、上記装置（切換弁）の縦断面図であ
つて、２は可動弁部材、４はシール部、６は固定
弁部材、８はベローである。ところがこの切換弁
にあつては、可動弁部材２とシール部４との閉動
作の際、粉体を噛込むおそれがあることと、長時
間使用すると密閉性が悪くなつて２種類の含粉体
ガスの確実な切換えが不可能となるおそれがあ
る。さらに弁の切換えの際、混合を避ける必要の
ある２種類の含粉体ガス、例えば石炭粉を含むメ
タンガスと生石灰粉を含む酸素ガスの場合、切換
弁の内部において前記の２種類の流体が混合する
おそれがある。この場合かかる流体が混合する
と、ガス中の石炭が燃焼して切換弁が過熱するお
それがある。 FIG. 1 is a longitudinal sectional view of the above device (switching valve), in which 2 is a movable valve member, 4 is a seal portion, 6 is a fixed valve member, and 8 is a bellows. However, with this switching valve, when the movable valve member 2 and the seal portion 4 are closed, there is a risk of powder being trapped, and if the valve is used for a long period of time, the sealing performance becomes poor and two types of powder may be contained. There is a possibility that reliable switching of body gases may become impossible. Furthermore, when switching the valve, in the case of two types of powder-containing gas that need to be avoided from mixing, for example, methane gas containing coal powder and oxygen gas containing quicklime powder, the two types of fluids mentioned above mix inside the switching valve. There is a risk of In this case, if such fluids are mixed, there is a risk that the coal in the gas will burn and the switching valve will overheat.

さらに、その過熱によりシール部の変形、焼損
が生じてシール不良を招き危険となる。加うる
に、ベローズが吹込み粉体により摩耗し、穴明き
が生じて２種類のガスが混合して爆発するおそれ
すらある。 Furthermore, the overheating causes deformation and burnout of the seal portion, leading to seal failure and danger. In addition, there is a risk that the bellows will be worn out by the blown powder, causing holes and causing the two types of gases to mix and explode.

本発明の目的は、上記従来技術の問題点を解消
しガス種選択のための流路切換えに際して、２つ
の流体の混合が確実に防止でき、かつ流出側のガ
ス圧力が低下することのないような切換弁を提供
することにある。 It is an object of the present invention to solve the problems of the prior art as described above, to reliably prevent mixing of two fluids when switching channels for gas type selection, and to prevent the gas pressure on the outflow side from decreasing. The purpose of the present invention is to provide a switching valve that provides a suitable switching valve.

本発明の他の目的は、さらにガスに伴送される
粉粒物が弁体とハウジングとの間に噛込まれるこ
とがなく、耐久性に優れ長期間にわたつて十分な
密閉性を有する構造の切換弁を提供することにあ
る。 Another object of the present invention is to provide a structure that is highly durable and has sufficient airtightness over a long period of time, in which particles entrained by gas are not caught between the valve body and the housing. Our objective is to provide switching valves for

上記の本発明の目的を達成するための、本発明
の要旨とするところは、この明細書の頭書に記載
した特許請求の範囲に掲記したとおりである。以
下に本発明にかかる切換弁の具体的構成につき、
底吹き転炉へ、その炉底から２種の流体（含石炭
粉メタン→含石灰粉酸素ガス）を精錬段階の推移
に応じて択一的に吹込むときの例で説明する。 The gist of the present invention to achieve the above objects of the present invention is as set forth in the claims at the beginning of this specification. The specific configuration of the switching valve according to the present invention will be described below.
An example will be explained in which two types of fluids (coal-containing powder methane → lime-containing powder oxygen gas) are alternatively blown into a bottom-blown converter from the bottom of the furnace depending on the progress of the refining stage.

転炉内への上記２種の流体の択一的供給は、１
つの通路を通じ３入口１出口構造の三方切換弁を
使つて流路の切換えを行うことにより行うが、そ
の切換えに当つては上述したように該流体の混合
を阻止しなければならない。 The alternative supply of the above two types of fluids into the converter is as follows: 1
This is done by switching the flow paths through two passages using a three-way switching valve with a three-inlet and one-outlet structure, but when switching, it is necessary to prevent mixing of the fluids as described above.

そこで本発明の切換弁は、流路切換えに際し弁
体内の主通路にパージ用流体が導入され、この弁
体主通路内の流体がパージ用流体に置換されるよ
うに構成する。 Therefore, the switching valve of the present invention is configured such that when switching the flow path, a purge fluid is introduced into the main passage within the valve body, and the fluid in the main passage of the valve body is replaced with the purge fluid.

第２図、第３図において、１２は弁体支承空間
を有するハウジングであつて、主ハウジング１４
およびこれにボルト１６によつて取付けられてい
るハウジングキヤツプ１８を有している。２０は
パツキン押えであり、ハウジングキヤツプ１８に
ボルト結合させてある。主ハウジング１４には、
弁体支承空間を外部に連通させるための第１流入
口２２、第２流入口２４が設けられており、それ
ら各流入口はそれぞれ異種のガスＡ，Ｂの供給管
路と連通する。またハウジング１２の前記流入口
２２，２４と直交する位置には転炉へ向う流出口
２６が設けられている。ハウジング１２に設けた
弁体支承空間内にはボール形の弁体２８が気密に
嵌合され、この弁体２８は流出口の軸心方向にそ
れぞれ延在部３０，３２を有し、この延在部３０
とハウジングキヤツプ１８との間に設けたグラン
ドパツキン３４を介して流出口２６軸心を中心と
して回転可能に支持されている。弁体２８には流
入口の一方と流出口と導通させるエネルギの主通
路３６が設けられており、図示例で言うとその一
方の開口３８ａが流入口２４と通じ他方の開口３
８ｂが流出口２６に通じるように形成されてい
る。この流出口２６は転炉の炉底羽口（図示せ
ず）に連通している。第１および第２の流入口２
２，２４の内側には弁体２８と接する部分を気密
に封じるために、それぞれ筒状のシートリング４
２，４２′がシート押え４４，４４′を介して嵌挿
してあり、弁体外周面に対して押圧された状態下
に配設されており、ガスＡ，Ｂが後述の包被状隙
間８０に流入するのが防止できるような構造とな
つている。 In FIGS. 2 and 3, 12 is a housing having a valve body supporting space, and the main housing 14
and a housing cap 18 attached thereto by bolts 16. 20 is a packing holder, which is bolted to the housing cap 18. The main housing 14 includes
A first inlet 22 and a second inlet 24 are provided for communicating the valve body support space with the outside, and each of these inlets communicates with supply pipes for different types of gases A and B, respectively. Further, an outlet 26 toward the converter is provided in the housing 12 at a position perpendicular to the inlets 22 and 24. A ball-shaped valve body 28 is airtightly fitted into the valve body support space provided in the housing 12, and this valve body 28 has extending portions 30 and 32, respectively, in the axial direction of the outlet. Zaibu 30
The outlet port 26 is rotatably supported around the axis of the outlet port 26 via a gland packing 34 provided between the outlet port 26 and the housing cap 18 . The valve body 28 is provided with a main energy passage 36 that communicates with one of the inflow ports and the outflow port, and in the illustrated example, one opening 38a communicates with the inflow port 24 and the other opening 3
8b is formed to communicate with the outlet 26. This outlet 26 communicates with a bottom tuyere (not shown) of the converter. First and second inlet 2
A cylindrical seat ring 4 is provided inside each of 2 and 24 in order to airtightly seal the portion in contact with the valve body 28.
2 and 42' are inserted through seat holders 44 and 44', and are placed under pressure against the outer circumferential surface of the valve body, and gases A and B are passed through the enveloping gap 80, which will be described later. The structure is such that it prevents water from flowing into the water.

また、ハウジング１２には、流入口２２，２４
と同一面上の直交する位置にパージガス導入口４
０が開口させてある。この導入口４０と流出口２
６とは、弁体２８に設けた主通路３６の一方の開
口３８ａが第１流入口２２第２流入口２４間へ
と移動のために回転する間、すなわち流路の切換
えが行なわれる間常時連通しており、切換えに当
り２種のガスＡ，Ｂが混合することがないように
工夫してある。 The housing 12 also includes inflow ports 22 and 24.
Purge gas inlet 4 is located perpendicular to the
0 is left open. This inlet port 40 and outlet port 2
6 means that one opening 38a of the main passage 36 provided in the valve body 28 rotates to move between the first inlet 22 and the second inlet 24, that is, while the flow path is switched. The two gases A and B are in communication so that they do not mix during switching.

そのために本発明にあつては、ハウジング１２
内周面と弁体２８外周面との間に、例えば該弁体
外周面の約半分を包囲するような包被状間隙８０
を形成する。従つて、パージガス導入口４０から
流入するパージガスは一旦この包被状間隙８０内
に入り、続いて主通路の一端流入側開口３８ａを
経て他端開口３８ｂを通過し流出口２６に向い転
炉へ流れる。 For this purpose, in the present invention, the housing 12
Between the inner circumferential surface and the outer circumferential surface of the valve body 28, there is an envelope-shaped gap 80 that surrounds, for example, about half of the outer circumferential surface of the valve body.
form. Therefore, the purge gas flowing in from the purge gas inlet 40 once enters the envelope-shaped gap 80, then passes through the inflow side opening 38a at one end of the main passage, passes through the opening 38b at the other end, heads toward the outlet 26, and enters the converter. flows.

弁体２８は流路切換えのために回転する。第４
図に弁体駆動装置４８の一例を示す。この駆動装
置４８は、一部で連通している並列する一対のシ
リンダ５０，５０′、各シリンダ５０，５０′中に
配設されたピストン５２，５２′、各ピストン５
２に連結された対向する側にラツク５６，５６′
を有するロツド５４，５４′、および上記ラツク
５６，５６′の両方と噛合するピニオン５８を備
えている。一方弁体２８の延在部３０にはカツプ
リング６０の一端が連設され、このカツプリング
６０の他端にはピニオン５８に連繋するピニオン
軸６２が取付けられている。弁体２８は、ラツク
付ロツド５４，５４′がピストン５２，５２′の往
復作動によつて動くときに、ピニオン５８を回転
させ、カツプリング６０および延在部３０を介し
て従動回転するのである。 The valve body 28 rotates to switch the flow path. Fourth
An example of the valve body driving device 48 is shown in the figure. This drive device 48 includes a pair of parallel cylinders 50, 50' that are partially in communication, pistons 52, 52' disposed in each cylinder 50, 50', and each piston 5.
Rack 56, 56' on opposite sides connected to 2
A pinion 58 is provided which meshes with both the rods 54, 54' and the racks 56, 56'. On the other hand, one end of a coupling ring 60 is connected to the extending portion 30 of the valve body 28, and a pinion shaft 62 coupled to the pinion 58 is attached to the other end of the coupling ring 60. The valve body 28 rotates the pinion 58 when the rack rods 54, 54' move due to the reciprocating action of the pistons 52, 52', and is driven to rotate via the coupling 60 and the extension 30.

第５図の１〜１２は、流路切換え作動時の弁体
２８回転に伴なう主通路３６と各流入口２２，２
４、パージガス導入口４０との関係を説明する図
である。図示例は、Ａガスが転炉へ導通している
状態からＢガスに切換わる過程である。弁体駆動
装置４８を作動させると、最初の状態１である第
１流入口２２と主通路入側部開口３６ａとの完全
な連通状態は徐々に不完全なものとなり、図示４
の状態でＡガスの転炉への供給は完全に止まる。
この状態では弁体２８を包囲するように形成した
包被状間隙８０内にパージガス導入口４０を通じ
てパージガスが充満させてあるので、主通路３６
内はパージガスで充されており、前記Ａガスはほ
とんど完全に排除された状態である。この状態は
図示９まで続き、図示１０まで回転するとパージ
ガスの一部はＢガスに置換わり、次第にその量を
増して、図示１２の段階で完全にＢガスだけにな
る。ＢガスからＡガスに切換えるときは、ピスト
ン５２，５２′を逆に動かすことにより、図示の
１０→１に向けて運転すればよい。 1 to 12 in FIG. 5 indicate the main passage 36 and each inlet port 22, 2 as the valve body 28 rotates during flow path switching operation.
4 is a diagram illustrating the relationship with a purge gas inlet 40. The illustrated example is a process in which gas A is switched to gas B from a state in which it is conducted to the converter. When the valve body drive device 48 is operated, the initial state 1 of complete communication between the first inlet 22 and the main passage inlet opening 36a gradually becomes incomplete, and the state shown in FIG.
In this state, the supply of A gas to the converter stops completely.
In this state, the enveloping gap 80 formed to surround the valve body 28 is filled with purge gas through the purge gas inlet 40, so that the main passage 36
The inside is filled with purge gas, and the A gas is almost completely removed. This state continues until 9 in the figure, and when the rotation reaches 10 in the figure, a part of the purge gas is replaced by B gas, and the amount gradually increases until it becomes completely only B gas at the stage 12 in the figure. When switching from B gas to A gas, the pistons 52, 52' may be moved in the opposite direction to operate from 10 to 1 as shown in the figure.

かかる切換えの特色は、弁体２８を包囲するよ
うに形成した包被状間隙８０の作用にある。すな
わち、該間隙８０内には炉内溶鋼の静圧に打ち勝
つに十分な圧力の好ましくはＡ，Ｂガス圧と等圧
に制御されたパージガス（Ar、N2等）が常時充
満しており、一定ガス圧制御の下でＡ，Ｂ両ガス
の混合が完全に阻止できる態勢下での切換えがで
きる。 A feature of this switching is the action of the envelope-shaped gap 80 formed so as to surround the valve body 28. That is, the gap 80 is always filled with a purge gas (Ar, N2, etc.) with a pressure sufficient to overcome the static pressure of the molten steel in the furnace, preferably controlled to be equal to the A and B gas pressures, Switching can be performed under constant gas pressure control so that mixing of both gases A and B can be completely prevented.

第６図および第７図は、この切換時におけるガ
スＡ，Ｂおよびパージ流体（本実施例ではガス）
Ｃの流量を示す経時変化である。図示の矢印の如
く回転するとガスＡがガスＢに切換わる途中の時
間でガスＣが主通路３６に供給され、この主通路
３６内のガスがガスＣに置換された後、ガスＢが
主通路３６に流れるようになり、ガスＡとガスＢ
との混合が完全に防止される。また第７図に示す
ように、逆方向に回転させてもガスＢがガスＡに
切換わる途中でガスＣが主通路３６に供給され同
様にして主通路３６内のパージが行なわれ、ガス
ＢとガスＡの混合が防止される。 Figures 6 and 7 show gases A, B and purge fluid (gas in this example) at the time of this switching.
This is a change over time showing the flow rate of C. When rotating as shown in the arrow, gas C is supplied to the main passage 36 during the time when gas A is switched to gas B, and after the gas in this main passage 36 is replaced with gas C, gas B is supplied to the main passage 36. 36, gas A and gas B
Mixing with other substances is completely prevented. Further, as shown in FIG. 7, even if the rotation is made in the opposite direction, gas C is supplied to the main passage 36 while gas B is being switched to gas A, and the main passage 36 is purged in the same way, and gas B and gas A are prevented from mixing.

なお上記具体例の説明においては弁体２８を一
対のシリンダーを組合わせた形式の駆動装置４８
によつて回転させているが、本発明はこれに限定
されるものではなく、例えば弁体２８を別途モー
タ駆動によつて回転させるようにしてもよい。ま
た上記説明は、切換弁１０が底吹き転炉羽口に採
用されている例に関するものであるが、本発明は
これに限らず、他の溶融金属収納用容器、例えば
炉外精錬容器等にも２種類のガス等の流体の混合
をさける必要のあるケースにも採用することがで
きる。 In the description of the above specific example, the valve body 28 is replaced by a drive device 48 of a type that combines a pair of cylinders.
However, the present invention is not limited to this, and for example, the valve body 28 may be rotated by a separate motor drive. Furthermore, although the above description relates to an example in which the switching valve 10 is employed in a bottom-blowing converter tuyere, the present invention is not limited to this, and can be applied to other molten metal storage containers, such as an out-of-furnace smelting container. This method can also be adopted in cases where it is necessary to avoid mixing two types of fluids such as gases.

以上説明したとおり本発明の切換弁は、流路切
換えに際し弁体内の主通路にパージ用流体が導入
され、この弁体主通路内の流体がパージ用流体に
置換されるように構成されているから２種類のガ
スの混合が確実に防止される。また、切換中の羽
口ガス圧力低下のおそれが全く解消され、安定し
てガスの切換えができる。 As explained above, the switching valve of the present invention is configured such that the purge fluid is introduced into the main passage within the valve body when switching the flow path, and the fluid in the main passage of the valve body is replaced with the purge fluid. Therefore, mixing of the two types of gas is reliably prevented. Furthermore, the fear of a drop in tuyere gas pressure during switching is completely eliminated, allowing stable gas switching.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来の弁の断面図、第２図は本発明の
具体例にかかる切換弁の断面図、第３図は一部を
切欠いて示す左側面図、第４図は弁体の駆動装置
の断面図、第５図１〜１２はＡガスからパージガ
スＣを介在させてのＢガスへの切換えのもようを
説明する図、第６図および第７図はガスＡ，Ｂ，
Ｃの流量の経時変化を示すグラフである。 １０……切換弁、１２……ハウジング、２２…
…第１流入口、２４……第２流入口、２６……流
出口、２８……弁体、３０，３２……弁体延在
部、３６……主通路、４０……パージガス導入
口、４８……弁体駆動装置、８０……包被状間
隙。 Fig. 1 is a cross-sectional view of a conventional valve, Fig. 2 is a cross-sectional view of a switching valve according to a specific example of the present invention, Fig. 3 is a partially cutaway left side view, and Fig. 4 is a drive of the valve body. A sectional view of the device, FIGS. 5, 1 to 12 are diagrams illustrating how gas A is switched to B gas with purge gas C, and FIGS. 6 and 7 are diagrams showing gases A, B,
It is a graph showing a change in the flow rate of C over time. 10...Switching valve, 12...Housing, 22...
...first inlet, 24...second inlet, 26...outlet, 28...valve body, 30, 32...valve body extension, 36...main passage, 40...purge gas inlet, 48... Valve body drive device, 80... Enveloping gap.

Claims (1)

【特許請求の範囲】 １ ２以上の異種流体流入口を設けてなるハウジ
ング内に、かかる流入口の１つと別に設けた排出
口との間を導通させる主通路を有する弁体を回転
可能に支承してなり、その弁体の回転によつて流
路の切換えが行なわれるよう構成された切換弁で
あつて、 ハウジングにパージ流体導入口を開口させ、そ
のハウジング内周面と弁体外周面との間に、ハウ
ジングに設けたパージ流体導入口に通じかつ弁体
回転による切換えの途中の間常時上記主通路の流
入側開口と連通するように構成される包被状間隙
を、該弁体を包囲するように形成してなる溶融金
属保持器への流体吹込み用切換弁。[Scope of Claims] 1. A valve body rotatably supported within a housing provided with two or more different fluid inlets and having a main passage that communicates between one of the inlets and a separately provided outlet. A switching valve configured to switch the flow path by rotating the valve body, the purge fluid inlet is opened in the housing, and the inner circumferential surface of the housing and the outer circumferential surface of the valve body are connected to each other. In between, the valve body is connected to an envelope-shaped gap configured to communicate with the purge fluid inlet provided in the housing and constantly communicate with the inflow side opening of the main passage during switching by the rotation of the valve body. A switching valve for blowing fluid into a molten metal holder formed in a surrounding manner.
JP59058162A 1984-03-28 1984-03-28 Select valve for fluid blowing in molten metal holder Granted JPS60205075A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
JP59058162A JPS60205075A (en) 1984-03-28 1984-03-28 Select valve for fluid blowing in molten metal holder
US06/605,137 US4552334A (en) 1984-03-28 1984-04-30 Flow change-over valve for the blowing of fluids into molten metal vessel
ZA843193A ZA843193B (en) 1984-03-28 1984-04-30 Flow change-over valve for the blowing of fluids into molten metal vessel
AU27554/84A AU545661B1 (en) 1984-03-28 1984-05-01 Flow change over valve
CA000453441A CA1212595A (en) 1984-03-28 1984-05-03 Flow change-over valve for the blowing of fluids into molten metal vessel
FR8406876A FR2566087B1 (en) 1984-03-28 1984-05-03 FLOW SWITCHING VALVE FOR BLOWING FLUIDS IN A MOLTEN METAL CRUCIBLE
KR8402395A KR890005125B1 (en) 1984-03-28 1984-05-03 Flow change-over valve for the blowing of fluids into molten metal vessel
IT20798/84A IT1174078B (en) 1984-03-28 1984-05-04 FLOW SWITCH VALVE FOR BLOWING FLUIDS IN MELT METAL CONTAINER

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59058162A JPS60205075A (en) 1984-03-28 1984-03-28 Select valve for fluid blowing in molten metal holder

Publications (2)

Publication Number Publication Date
JPS60205075A JPS60205075A (en) 1985-10-16
JPS6344995B2 true JPS6344995B2 (en) 1988-09-07

Family

ID=13076290

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59058162A Granted JPS60205075A (en) 1984-03-28 1984-03-28 Select valve for fluid blowing in molten metal holder

Country Status (8)

Country Link
US (1) US4552334A (en)
JP (1) JPS60205075A (en)
KR (1) KR890005125B1 (en)
AU (1) AU545661B1 (en)
CA (1) CA1212595A (en)
FR (1) FR2566087B1 (en)
IT (1) IT1174078B (en)
ZA (1) ZA843193B (en)

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Also Published As

Publication number Publication date
AU545661B1 (en) 1985-07-25
ZA843193B (en) 1984-11-28
KR890005125B1 (en) 1989-12-11
CA1212595A (en) 1986-10-14
IT8420798A0 (en) 1984-05-04
IT1174078B (en) 1987-07-01
KR850007087A (en) 1985-10-30
US4552334A (en) 1985-11-12
FR2566087A1 (en) 1985-12-20
JPS60205075A (en) 1985-10-16
IT8420798A1 (en) 1985-11-04
FR2566087B1 (en) 1987-05-29

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